Bar-heating furnace



Jan. 3, 1928.

Filed May e. 1926 2 Sheets-Sheet l BH1@ KJ.,

awww:

Jan.3,192s. 1,654,678

F. w. BRooKE BAR HEATING FURNACE Filed May 8. 1926 'y 2 Sheets-Sheet 2 5M., H4-l I lli of@ Lfi b QEQLI',

Patented Jan. 3, 1928.

' UNITED STATES FRANK W.' BROOKE, OF PITTSBURGH, PENNSYLVANIA.

BAB-HEATING FUBNCE.

Application Atiled lay 8,

v 3 is a detached plan view of a supplemental ways which are elevated detail.

The furnace may be any well known or suitable type of continuous heating furnace, such for instance as\that shown in Letters Patent No. 632,020, in which the pieces being heated are pushed in contiguous succession u on a track extending through the heatingc amber. however, a furnace intended for the palrheatin of sheet-bars, which are slabs of iron 4or stee having a thicknessless than the redimensions of their opposite flat surfaces, and which rest on edge on the track in their assage through the heating-chamber. This furnace, as shown inthe drawings, is provided with a combustion-chamber 1 for heating by means of coal, using a standard form of Stoker, the flame and products of combustion flowing over the bridgewall 2 into the heating-chamber 3, and thence through the heating-chamber and out through the lues 4, 4, at the opposite or rear end of the heatin -chamber, and into the stack-flue 5. But t e character of fuel emloyed and the manner of its introduction into the heating-chamber are not material to the invention.

The bars or billets being heated are caused to pass through the heating-chamber 3 on above the floor 6 of the chamber, with the space beneath the ways in open communication with the body of the chamber. These ways preferably consist of ho'llow water-cooled skid-pipes 7 of well known form which are laid in the top surfaces of pedestals 9 arranged at intervals in rows longitudinally of the chamber. Thus a pair of the lon 'tudinal skid-pipes 7 constispective tutes a track t rough the chamber for the bars or billets.

In the heating-chamber the space 13 underneath the bars on the track is in open communication with the body of the heatingchamber through the openings 14 between high heat I have shown in the drawings,-

1926. serial No. 167,647.

the pedestals'9. In order to draw active currents of the heated products of combustion around and underneath the bars, flue-ports 15 are formed in the floor 6 of the chamber beneath the track and are connected to a flue .'16 underneath the door, the latter opening into the stack-Hue 5. Thus not only is there la'lways maintainedthe main current of thev products of combustion above the bars from the front to the rear of the heating chamber, but commencing at the 'front of the chamber and throughout its length active currents of intensity are caused to flow down around and beneathethe bars, thus subjectin the bars equally on'all exposed surfaces, an throughout their travel, to immersion in an active homogeneous bath of heat ofsubstantially equal intensity in an given crosssectional zone taken transverse y of the heatis formed in the front end-wall 21 and is provided with a verticallysliding door 22. The reciprocable pusher-head 23 may be operated by any suitable means, various types of which are well known. In this case the head is shown as connected at its opposite ends to the threaded rods 24, which are reciprocated through suitable connections with the armature-shaft of themotor 25.

For retaining the row of bars in place in the heating-chamber and preventing them from falling backwardly there is provided a suitable latch or support which is preferably automatic in operation. The preferred latch comprises a head 38 mounted on the outer end of the bent arm jects inwardly and is pivoted medially at 40 underneath the heating-chamber. A weight 41 is carried on the inner end of the arm, and the head 38 works through a slot or recess 42 face of the head 38 is shaped yto support the bars in uprightv or other desired position, and its body portion slopes outwardly and downwardly in an inclined outer face 44. When the bars are pushed into the ur- 39, which proi in the sole-plate 43. The inner inward vmovementv ofl thel bar-supporting .head 38 into supporting Contact with the rear Iface of theoutermost bar, thus holding the entire row of bars from falling backwardly.

The lower edge of the door 22 has a slot 45 of suitable form Vto fit the head 38, so that the front opening of the furnace may be kept entirely closed except only' during the chargin of the bars.

The s id-track 7 terminates at the point 50 within th'e heating-chamber, and an inclined track or chute 51 extends downwardoint 50 to the liv and outwardly from. the

is is provided charge-openin 52', whc

.' with a swinging oor 53. The inclined track 51 Amay consist in whole or in part of'bent extenslons 54 of the skid-pipes but A preferably, as shown, such bent extensions ters minate at an intermediate platform 55. In

combination with the platform 55 vthere are arranged at its opposite ends channeled Wheels or discs 56, mounted on a shaftv57. 1 Thechannels 58 formed in the peripheries of the discs 56 are in alignment the one with the other, and are of a width suliicient'to span the opposite ends of the bars resting Aon the platform 55. The forward walls 59 4 act as ali 'edges of t e bars'as they slide down upon of the opposite channels 58 when in the position shown in Figure. 2 of the drawin s, ing stops or abutments for t e the platform 55, and the rear-walls 60 of the channels act,as dogs on the rotation of the discs 56 to push the bars oif the platform, whence they slide down the lower portion of the inclined track o r chute 51 and out through the discharge-opening. The shaft 57 is turned intermittently, as vby the motor 61, to bring opposite channels 58v into position to receive the bars.

vbe tilted outwardly, and

Above the apex of the incline 51 at the terminal of the track. 7 there is an abutment 62, in the path of the upper portions of the successive bars, sothat as a bar comes to the apex of the incline its lower edge will thus the bar will slide down the incline with its lower edge in advance, and, as shownin the drawings, the edges of the successive bars or pairs of bars,

at theiropposite ends, will be stopped by evenly4 the abutments 459, and the bars can be piled one upon the other on the platform 55. he abutment 62 has su porting-arms 63 projecting through the wal of the furmore of the heated bars, as may be desired, i

over the apex of the incline 51, the lower edges ofthe bars thus discharged being tilted outwardly by the abutment 62,`and the bars being properly aligned upon the platform by contact of theiredges with the abutments 59, and then by turning the shaft 57 the abutments 60 will push the bars olf the platform, whence they will slide down the lower 7 portion of the incline '51 and out of the ,fur-

-nace.

In Figure 3 there isshown one of a number of extension membersff'or the head 23, to be usedefor the purpose of emptying all of the bars from the heatin -chamber in case of a shut-down of the rolling-mill, or-other interruption of the operation. For ,that purpose the head 23 may be provided with slots, atl its opgosite ends for the reception of extension ars 66, which are connected, as

by slots and pins 67, with the supplemental head 68. In the same way additional bars and supplemental heads may be provided. Therefore in the case of an lnterruption of the operation of the mill, if-it is desired to em t the heating-chamber of the furnace,

an t us avoid scaling or other injury of the barsfthe sup lemental head 68 may be connected to thellieadi23 as described, and upon the llatter having reached the limit' of its traverse, another pair of bars 0r a second head and pair of-.bars may be interposed be-` tween the ends of the bars 67 and the head 23, and thus by means of the introduction of these extensions the charging mechanism may be operated to push the entire row of bars out of the heating chamber. l

Of course it will be understood that the controlling'mechanism for the motors 25 and l 61 may be Iplaced at one (point, sol as to b operated by a single atten ant.

I claim as my invention:

1.. A bar-heating furnace having a. heatb ars arranged in said c amber, in combination with means arranged at one end ofsaid track for impelllng successive bars upon and ing-chamber, and 'asup orting-trwcl; for the over said track, and an abutment arranged at the opposite end of said: track in the Path gf the travel of the upper portions o the 2. A bar-heating furnace havin a heat'- v ing-chamber, and a sup orting trae4 for the bars 'arranged in said c amber, in jcombin'a- A' tion with means arranged 'at one end of said track for impelling successive bars upon and over said track, a downwardly inclined dis-` charge at the opposite end of said track, and

an abutment arranged above the apex of said incline in the path of the travel of the upper portionsof the bars.

3. A bar-heating furnace having a heatl ing-chamber, and a supporting-track fonthe. bars arranged in said chamber, 1n combina-` tion with means arranged at one end of sald track for impelling-successivebars upon and track for impellng bars upon and over Said over said track, a downwardly inclined distrack, ai downwardly inclmed discharge at charge at the opposite end of the track, movthe opposite end ofthe track, an interme- 15 able bar-receivmg means arranged at a mediate latform in said inclined discharge,

l dial point in said inclined discharge, and movab e bar-receiving and aligning means,

means for moving said Vbar-receiving meansA and means for moving the same first into oo- Y into and away from the path of thegbarsovernoperative relation with said platform to rethe inclined discharge. A ceive and align the bars and then to dis- 2@ LA bar-heating furnace having a heatcharge the bars from said lat-form.

10 ing-chamber, and a supporting-track for the 'In testimony whereof I ave hereunto set lbars arranged in said chamber, in combinamy hand. tion with means arranged at one end 0f said FRANK W. BROOKE, 

